diff options
Diffstat (limited to 'testsuites/rhealstone/rhdeadlockbrk/deadlockbrk.c')
| -rw-r--r-- | testsuites/rhealstone/rhdeadlockbrk/deadlockbrk.c | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/testsuites/rhealstone/rhdeadlockbrk/deadlockbrk.c b/testsuites/rhealstone/rhdeadlockbrk/deadlockbrk.c new file mode 100644 index 0000000000..8fdf7f8deb --- /dev/null +++ b/testsuites/rhealstone/rhdeadlockbrk/deadlockbrk.c @@ -0,0 +1,210 @@ +/* + * Copyright (c) 2014 Daniel Ramirez. (javamonn@gmail.com) + * + * This file's license is 2-clause BSD as in this distribution's LICENSE file. + */ + +#include <rtems/timerdrv.h> +#include <timesys.h> + +#define BENCHMARKS 20000 + +rtems_task Task01( rtems_task_argument ignored ); +rtems_task Task02( rtems_task_argument ignored ); +rtems_task Task03( rtems_task_argument ignored ); +rtems_task Init( rtems_task_argument ignored ); + +rtems_id Task_id[3]; +rtems_name Task_name[3]; +rtems_id sem_id; +rtems_name sem_name; +rtems_status_code status; + +uint32_t count; +uint32_t telapsed; +uint32_t tswitch_overhead; +uint32_t tobtain_overhead; +uint32_t sem_exe; + +rtems_task Init( rtems_task_argument ignored ) +{ + rtems_attribute sem_attr; + rtems_task_priority pri; + rtems_mode prev_mode; + + Print_Warning(); + + sem_attr = RTEMS_INHERIT_PRIORITY | RTEMS_BINARY_SEMAPHORE | RTEMS_PRIORITY; + + sem_name = rtems_build_name( 'S','0',' ',' ' ); + status = rtems_semaphore_create( + sem_name, + 1, + sem_attr, + 0, + &sem_id + ); + directive_failed( status, "rtems_semaphore_create of S0" ); + + Task_name[0] = rtems_build_name( 'T','A','0','1' ); + status = rtems_task_create( + Task_name[0], + 26, /* High priority task */ + RTEMS_MINIMUM_STACK_SIZE, + RTEMS_DEFAULT_MODES, + RTEMS_DEFAULT_ATTRIBUTES, + &Task_id[0] + ); + directive_failed( status, "rtems_task_create of TA01" ); + + Task_name[1] = rtems_build_name( 'T','A','0','2' ); + status = rtems_task_create( + Task_name[1], + 28, /* Mid priority task */ + RTEMS_MINIMUM_STACK_SIZE, + RTEMS_DEFAULT_MODES, + RTEMS_DEFAULT_ATTRIBUTES, + &Task_id[1] + ); + directive_failed( status, "rtems_task_create of TA02" ); + + Task_name[2] = rtems_build_name( 'T','A','0','3' ); + status = rtems_task_create( + Task_name[2], + 30, /* Low priority task */ + RTEMS_MINIMUM_STACK_SIZE, + RTEMS_DEFAULT_MODES, + RTEMS_DEFAULT_ATTRIBUTES, + &Task_id[2] + ); + directive_failed( status, "rtems_task_create of TA03" ); + + /* find overhead of obtaining semaphore */ + benchmark_timer_initialize(); + rtems_semaphore_obtain( sem_id, RTEMS_WAIT, 0 ); + tobtain_overhead = benchmark_timer_read(); + rtems_semaphore_release( sem_id ); + + rtems_task_mode( RTEMS_PREEMPT, RTEMS_PREEMPT_MASK, &prev_mode ); + /* Lower own priority so tasks can start up and run */ + rtems_task_set_priority( RTEMS_SELF, 40, &pri ); + + /* Get time of benchmark with no semaphores involved, i.e. find overhead */ + sem_exe = 0; + status = rtems_task_start( Task_id[2], Task03, 0 ); + directive_failed( status, "rtems_task_start of TA03" ); + + /* Get time of benchmark with semaphores */ + sem_exe = 1; + status = rtems_task_restart( Task_id[2], 0 ); + directive_failed( status, "rtems_task_start of TA03" ); + + /* Should never reach here */ + rtems_test_assert( false ); +} + +rtems_task Task01( rtems_task_argument ignored ) +{ + /* All tasks have had time to start up once TA01 is running */ + + /* Benchmark code */ + benchmark_timer_initialize(); + for ( count = 0; count < BENCHMARKS; count++ ) { + if ( sem_exe == 1 ) { + /* Block on call */ + rtems_semaphore_obtain( sem_id, RTEMS_WAIT, 0 ); + } + + if ( sem_exe == 1 ) { + /* Release semaphore immediately after obtaining it */ + rtems_semaphore_release( sem_id ); + } + + /* Suspend self, go to TA02 */ + rtems_task_suspend( RTEMS_SELF ); + } + telapsed = benchmark_timer_read(); + + /* Check which run this was */ + if (sem_exe == 0) { + tswitch_overhead = telapsed; + rtems_task_suspend( Task_id[1] ); + rtems_task_suspend( Task_id[2] ); + rtems_task_suspend( RTEMS_SELF ); + } else { + put_time( + "Rhealstone: Deadlock Break", + telapsed, + BENCHMARKS, /* Total number of times deadlock broken*/ + tswitch_overhead, /* Overhead of loop and task switches */ + tobtain_overhead + ); + rtems_test_exit( 0 ); + } + +} + +rtems_task Task02( rtems_task_argument ignored ) +{ + /* Start up TA01, get preempted */ + if ( sem_exe == 1) { + status = rtems_task_restart( Task_id[0], 0); + directive_failed( status, "rtems_task_start of TA01"); + } else { + status = rtems_task_start( Task_id[0], Task01, 0); + directive_failed( status, "rtems_task_start of TA01"); + } + + /* Benchmark code */ + for ( ; count < BENCHMARKS ; ) { + /* Suspend self, go to TA01 */ + rtems_task_suspend( RTEMS_SELF ); + + /* Wake up TA01, get preempted */ + rtems_task_resume( Task_id[0] ); + } +} + +rtems_task Task03( rtems_task_argument ignored ) +{ + if (sem_exe == 1) { + /* Low priority task holds mutex */ + rtems_semaphore_obtain( sem_id, RTEMS_WAIT, 0 ); + } + + /* Start up TA02, get preempted */ + if ( sem_exe == 1) { + status = rtems_task_restart( Task_id[1], 0); + directive_failed( status, "rtems_task_start of TA02"); + } else { + status = rtems_task_start( Task_id[1], Task02, 0); + directive_failed( status, "rtems_task_start of TA02"); + } + + /* Benchmark code */ + for ( ; count < BENCHMARKS ; ) { + if ( sem_exe == 1 ) { + /* Preempted by TA01 upon release */ + rtems_semaphore_release( sem_id ); + } + + if ( sem_exe == 1 ) { + /* Prepare for next Benchmark */ + rtems_semaphore_obtain( sem_id, RTEMS_WAIT, 0 ); + } + /* Wake up TA02, get preempted */ + rtems_task_resume( Task_id[1] ); + } +} + +/* configuration information */ +#define CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER +#define CONFIGURE_APPLICATION_NEEDS_TIMER_DRIVER + +#define CONFIGURE_TICKS_PER_TIMESLICE 0 +#define CONFIGURE_RTEMS_INIT_TASKS_TABLE +#define CONFIGURE_MAXIMUM_SEMAPHORES 1 +#define CONFIGURE_MAXIMUM_TASKS 4 + +#define CONFIGURE_INIT +#include <rtems/confdefs.h> |